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Current as a function of time that flows during a lightning strike

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Pleas address Problem #1 only. See attached pdf file. Thank you

1) The current as a function of time that flows during a lightning strike usually has a 'zig-zag' appearance as a typical strike is made of 3 to 4 strokes. High speed videos (examined frame-by frame) show that most lightning strikes are made up of multiple individual strokes.....

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The solution examines current as a function of time that flows during lightning stick that appears as a zig-zag.

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